A closed-loop stepper motor

Abstract

The utility model relates to a closed-loop stepper motor, which includes a motor body, a magnetic steel mounting frame, a magnetic steel, an encoder plate mounting bracket, an encoder plate, a magnetic shield and an encoder connecting harness; the encoder plate is a magnetic induction encoder; the magnetic steel is mounted on the magnetic steel mounting frame and then fixed to the motor body, the encoder plate is fixed to the encoder plate mounting bracket and then fixed to the motor body, the encoder connecting harness is fixed to the magnetic shield, and the magnetic shield is fixed to the motor body. Compared with the prior art, the utility model has the advantages of ensuring higher detection accuracy and being applicable to different working environments.

Description

Technical Field

[0001] The utility model relates to a motor, in particular to a closed-loop stepping motor. Background Art

[0002] With the rapid development of the drive industry, the market has higher and higher requirements for the performance of closed-loop stepper motors. In order to meet the limited space and different usage environments, closed-loop stepper motors with high integration and high precision are usually pursued. The main defects of general closed-loop stepper motor products are:

[0003] The high degree of integration results in the overall size of the motor being too large. The components required for the encoder are difficult to design and arrange without increasing the axial length and radial dimensions of the motor. The product position feedback cannot be guaranteed, and the inductive encoder cannot ensure the concentricity requirements with the magnetic steel, which can easily cause the magnetic steel reading failure. The unreasonable design of components such as connectors can easily cause them to be in a state of external force pulling for a long time, which poses a great challenge to the life of the connector itself.

[0004] Therefore, how to ensure high detection accuracy while reducing the size of the motor becomes a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a closed-loop stepping motor in order to overcome the defects of the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a closed-loop stepper motor is provided, the motor comprising a motor body, a magnetic steel mounting frame, a magnetic steel, an encoder plate mounting bracket, an encoder plate, a magnetic shield and an encoder connecting harness; the encoder plate is a magnetic induction encoder;

[0008] The magnetic steel is mounted on the magnetic steel mounting frame and then fixed on the motor body, the encoder plate is fixed on the encoder plate mounting bracket and then fixed on the motor body, the encoder connecting harness is fixed on the magnetic shield, and the magnetic shield is fixed on the motor body.

[0009] As a preferred technical solution, the magnetic steel is fixed on the magnetic steel mounting frame by gluing.

[0010] As a preferred technical solution, the magnetic steel mounting frame is fixed to the motor body by gluing.

[0011] As a preferred technical solution, the encoder plate is fixed to the encoder plate mounting bracket by a first screw.

[0012] As a preferred technical solution, the encoder plate is fixed to the motor body by a first screw.

[0013] As a preferred technical solution, the first screw is a cross recessed pan head screw.

[0014] As a preferred technical solution, the encoder connection harness adopts a side outlet method and is fixed on the magnetic shield by an injection-molded buckle.

[0015] As a preferred technical solution, the magnetic shield is fixed to the motor body by a second screw.

[0016] As a preferred technical solution, the second screw is a cross recessed pan head screw.

[0017] As a preferred technical solution, four second screws are provided.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1) The encoder board of the utility model adopts a magnetic induction encoder, and the encoder connection harness adopts an injection-molded buckle, and a magnetic shield is used to fix the harness and protect the magnetic induction encoder, which can ensure high detection accuracy and be suitable for different working environments.

[0020] 2) The encoder connection harness of the utility model adopts a side outlet mode, which reduces the height of the closed-loop stepper motor and greatly saves the installation space of the equipment.

[0021] 3) The utility model adopts a screw fixing method to connect the motor body, the magnetic shield, the magnetic induction encoder plate and the encoder bracket, which greatly improves the convenience of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the utility model.

[0024] Among them, 1. motor body, 2. magnetic steel mounting frame, 3. magnetic steel, 4. encoder board mounting bracket, 5. encoder board, 6. first screw, 7. magnetic shield, 8. encoder connecting harness, 9. second screw. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0026] like Figure 1 and Figure 2 As shown, the utility model is a closed-loop stepper motor, which includes a motor body 1, a magnetic steel mounting frame 2, a magnetic steel 3, an encoder plate mounting bracket 4, an encoder plate 5, a magnetic shield 7 and an encoder connecting harness 8; the encoder plate 5 is a magnetic induction encoder; the magnetic steel 3 is mounted on the magnetic steel mounting frame 2 and then fixed to the motor body 1, the encoder plate 5 is fixed to the encoder plate mounting bracket 4 and then fixed to the motor body 1, the encoder connecting harness 8 is fixed to the magnetic shield 7, and the magnetic shield 7 is fixed to the motor body 1.

[0027] That is, the overall structure of the utility model is simple, and the closed-loop stepping motor encoder adopts a magnetic induction encoder, which only includes a motor body, a magnetic shield, a magnetic induction encoder board, an encoder bracket, and an encoder harness.

[0028] The encoder connection harness 8 adopts a side outlet mode and is fixed on the magnetic shield 7 by an injection-molded buckle. The utility model adds an injection-molded buckle to the encoder harness and uses a magnetic shield to fix the harness and protect the magnetic induction encoder, which can ensure high detection accuracy and be suitable for different working environments. At the same time, the height of the closed-loop stepper motor is reduced, greatly saving the installation space of the equipment.

[0029] This utility model is a closed-loop stepper motor with a smaller size. The specific installation process is as follows:

[0030] The magnetic steel 3 is fixed on the magnetic steel mounting frame 2 by applying glue, and is fixed on the motor body 1 by applying glue again;

[0031] The encoder plate 5 is fixed to the encoder plate mounting bracket 4 by two first screws 6, and finally fixed to the motor body 1 by two first screws 6;

[0032] The encoder connection harness 8 is fixed to the magnetic shield 7 by snapping, and finally fixed to the motor body 1 by four second screws 9 .

[0033] The first screw and the second screw are both cross-recessed pan head screws. The magnetic shield and the motor body are fixed by four screws, or other equivalent structures, such as a snap-on mounting structure.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A closed-loop stepper motor, characterized in that: The motor comprises a motor body (1), a magnetic steel mounting frame (2), magnetic steel (3), an encoder plate mounting bracket (4), an encoder plate (5), a magnetic shield (7) and an encoder connecting harness (8); the encoder plate (5) is a magnetic induction encoder; The magnetic steel (3) is mounted on the magnetic steel mounting frame (2) and then fixed on the motor body (1); the encoder plate (5) is fixed on the encoder plate mounting bracket (4) and then fixed on the motor body (1); the encoder connecting harness (8) is fixed on the magnetic shield (7); and the magnetic shield (7) is fixed on the motor body (1).

2. A closed-loop stepper motor according to claim 1, characterized in that: The magnetic steel (3) is fixed on the magnetic steel mounting frame (2) by gluing.

3. A closed-loop stepper motor according to claim 1, characterized in that: The magnetic steel mounting frame (2) is fixed on the motor body (1) by gluing.

4. A closed-loop stepper motor according to claim 1, characterized in that: The encoder plate (5) is fixed to the encoder plate mounting bracket (4) by means of a first screw (6).

5. A closed-loop stepping motor according to claim 4, characterized in that: The encoder plate (5) is fixed to the motor body (1) by means of a first screw (6).

6. A closed-loop stepping motor according to claim 4 or 5, characterized in that: The first screw (6) is a cross recessed pan head screw.

7. A closed-loop stepping motor according to claim 1, characterized in that: The encoder connection harness (8) adopts a side outlet mode and is fixed on the magnetic shield (7) by means of an injection-molded buckle.

8. A closed-loop stepper motor according to claim 1, characterized in that: The magnetic shield (7) is fixed to the motor body (1) via a second screw (9).

9. A closed-loop stepping motor according to claim 8, characterized in that: The second screw (9) is a cross recessed pan head screw.

10. A closed-loop stepping motor according to claim 8, characterized in that: There are four second screws (9).

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